Essentials of Genetics (9th Edition) - Standalone book
9th Edition
ISBN: 9780134047799
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 3, Problem 12PDQ
When working out genetics problems in this and succeeding chapters, alwaysassumethatmembersof the P1 generation are homozygous, unless the information or data you are given require you to do otherwise.
In Drosophila, gray body color is dominant over ebony body color, while long wings are dominant over vestigial wings. Work the following crosses through the F2 generation, and determine the genotypic and
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When working out genetics problems in this and succeeding chapters, always assume that members of the P1 generation are homozygous, unless the information or data you are given require you to do otherwise.HOW DO WE KNOW? we focused on the Mendelian postulates, probability, and pedigree analysis. We also considered some of the methods and reasoning by which these ideas, concepts, and techniques were developed. On the basis of these discussions,
what answers would you propose to the followingquestion.
Question: Since experimental crosses are not performed in humans, how do we know how traits are inherited?
Required information
A single-factor cross is one in which the inheritance of only one character and its associated genotypes are followed.
Punnett squares are often used to predict the outcomes of simple genetic crosses. Based on Mendel's laws, the
genotypes of the parents can be used to predict the genes in their gametes and the resulting progeny. A Punnett square
enables you to predict the types of offspring the parents are expected to produce and in what proportions.
Sickle cell anemia is a recessive trait in humans. In a cross between two parents who are heterozygous for the gene, what are the gamete possibilities of the parer
Mother's gamete
possibilities
Father's gamete
possibilities
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Monohybrid practice problems
In pea plants, the traits below exhibit the following dominance patterns:
Recessive
Expression:
Wrinkled
Dominant
Expression:
Round
Purple
|Yellow
Inflated
Green
Trait:
1. Seed shape (R)
2. Flower color (P)
3.
White
Green
Constricted
Yellow
Terminal
Short
Color of seed coat (Y)
Form of ripe pods (I)
4.
5.
|Color of unripe pods (G)
6.
Position of flowers (A)
7. Length of stem (T)
Axial
Tall
Record the genotypes for pea plants with the following descriptions (The first one has been done for
you:
1.
а. дg
A plant with yellow pods
A planteozygous for ereen pods
С.
A plant homozvaoue ta vellow seeds
A plant with white flowers
A plant with areen seeds
2. Complete the Punnett Square showing the cross between a pea plant with pure round seeds and a
plant with wrinkled seeds. Summarize the phenotypes and genotypes for the offspring.
Parental cross
Genotypic Percentages:
Phenotypic Percentages:
3. A pea plant with pure yellow…
Chapter 3 Solutions
Essentials of Genetics (9th Edition) - Standalone book
Ch. 3 -
CASE STUDY | To test or not to test
Thomas...Ch. 3 -
CASE STUDY | To test or not to test
Thomas...Ch. 3 - CASE STUDY | To test or not to test Thomas first...Ch. 3 -
CASE STUDY | To test or not to test
Thomas...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...
Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - Prob. 26PDQCh. 3 -
When working out genetics problems in this and...
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- 11:42 Cancel Markup Done Name: Date: Monohybrid practice problems In pea plants, the traits below exhibit the following dominance patterns: Recessive Expression: Wrinkled Dominant Expression: Round Purple |Yellow Inflated Green Trait: 1. Seed shape (R) 2. Flower color (P) 3. White Green |Constricted Yellow Terminal Short Color of seed coat (Y) Form of ripe pods (I) 4. 5. |Color of unripe pods (G) 6. Position of flowers (A) 7. Length of stem (T) Axial Tall Record the genetvnes f-Der-- = foltrawino deserintins (The first one has been done for you): а. дg A plant with yellow poás- EplancteOZygous for ereen pods N 0)e Owers С. A plant homozvaoue ycilow seeds A plant with white flowers TA piamt wilh areen seeds. Complete the Punnett Square showing the eress between a pea plant with pure round seeds and a plant with wrinkled seeds. Summanze the phenotypes and genotypes for the offspring. Genolynic PorcentadCS. Parental cross PhenolypicPerceniageS 3A pea plant with pure velow seeds is erossed…arrow_forwardChi Squared Problems In the garden pea, yellow cotyledon color is dominant to green, and inflated pod shape is dominant to the constricted form. Considering both of these traits jointly in self-fertilized dihybrids, the progeny appeared in the following numbers: 193 green, inflated 184 yellow constricted 556 yellow, inflated 61 green, constricted Do these genes assort independently? Support your answer using Chi-square analysis. (SOLVE USING EXCEL)arrow_forward11:42 ll Cancel Markup Done Name: Date: Monohybrid practice problems In pea plants, the traits below exhibit the following dominance patterns: Recessive Expression: Wrinkled Dominant Expression: Round Purple |Yellow Inflated Green Trait: 1. Seed shape (R) 2. Flower color (P) 3. White Green |Constricted Yellow Terminal Short Color of seed coat (Y) Form of ripe pods (I) 4. 5. |Color of unripe pods (G) 6. Position of flowers (A) 7. Length of stem (T) Axial Tall Record the genetvnes f-Der-- = foltrawino deserintins (The first one has been done for you): а. дg A plant with yellow poás- EplancteOZygous for ereen pods N 0)e Owers С. A plant homozvaoue ycilow seeds A plant with white flowers TA piamt wilh areen seeds. Complete the Punnett Squae showing the eress between a pea plant wth pure round seeds and a plant with wrinkled seeds. Summanze the phenotypes and genotypes for the offspring. Genolynic PorcentagCS. Parental cross PhenolypicPerceniageS 3. A pea plant with pure yellow seeds is…arrow_forward
- 11:42 ll Cancel Markup Done Name: Date: Monohybrid practice problems In pea plants, the traits below exhibit the following dominance patterns: Recessive Expression: Wrinkled Dominant Expression: Round Purple |Yellow Inflated Green Trait: 1. Seed shape (R) 2. Flower color (P) 3. White Green |Constricted Yellow Terminal Short Color of seed coat (Y) Form of ripe pods (I) 4. 5. |Color of unripe pods (G) 6. Position of flowers (A) 7. Length of stem (T) Axial Tall Record the genetvnes f-Der-- = foltrawino deserintins (The first one has been done for you): а. дg A plant with yellow poás- EplancteOZygous for ereen pods N 0)e Owers С. A plant homozvaoue ycilow seeds A plant with white flowers TA piamt wilh areen seeds. Complete the Punnett Square showing the eress between a pea plant with pure round seeds and a plant with wrinkled seeds. Summanze the phenotypes and genotypes for the offspring. Genolynic PorcentadCS. Parental cross PhenolypicPerceniageS 3A pea plant with pure velow seeds is…arrow_forwardRequired information A heterozygous tall pea plant is allowed to self-fertillze. From the F1 progeny, a phenotyplcally tall plant was randomly chosen and mated to a phenotypically dwarf pea plant. What is the probability of producing any phenotyplcally dwarf plants from this mating? Multiple Choice 1/2 2/3 1/4 1/3 10 Show All MacBook Airarrow_forwardQuestion: On the basis of Mendel's hypothesis and observations, predict the results from the following crosses in garden peas: (a) a tall (dominant and homozygous) variety crossed with a dwarf variety: (b) the progeny of (a) selfed; (c) the progeny from (a) crossed with the original tall parent; (d) the progeny from (a) crossed with the original dwarf-parent variety.arrow_forward
- PLease help, double and triple check your answers, im using this to study, these questions are NOT graded they are PRACTICE problems. Please help with all 4 parts of this question!!!!!!! A. Your maternal grandpa is colorblind but both your mom and dad are not affected. What are the chances of your sister being colorblind? What are the chances of your brother being colorblind? (Colorblindness is X-linked recessive) B. Regarding the problem above, if your sister’s husband is colorblind, what are the chances that their first son will be colorblind? C. Two genes, A and X, exhibit incomplete linkage. The frequency of each parental gamete (AX and ax) is 45%. What is the approximate frequency of the Ax gamete? D. There are three genes located in the gene order A--B--C on a chromosome. Would you expect the recombination frequency to be higher between A and B or A and C?arrow_forwardQuestion: Black hair of the mouse is produced by dominant gene B and white hair by recessive allele b.Female with black hair crossed with male black hair (both genotypes are heterozygous). Produced individuals 112 and 113, female with white hair and male with black hair, then mating occur between 114 and 113, and another mating occur between 112 and 111. assume that 111 and 114 individuals do not carry the recessive allele, represents the above in a pedigree chart and determine the genotype of each individual.arrow_forwardGenetic Problems Read the following genetic problems, and then complete the activities and questions for each problem 1. In the pea plant, the green pod color allele is dominant to the yellow pod color allele. o Set-up a monohybrid cross between a pea plant that is heterozygous and a true-breeding yellow pod pea plant. o What percentage of the offspring produced from this cross would you expect to have yellow pods? 2. Within a mouse population, the black fur allele (B) is dominant to the white fur allele (b) and the short whisker allele (S) is dominant to the ngs long-whisker allele (s). o A heterozygous black-furred short-whiskered mouse is crossed with a homozygous white-furred long-whiskered mouse. o What percentage of the offspring will be black-furred with long whiskers? 3. A physician is examining the blood types of children from a family. o Child 1 has blood type AB, Child 2 has blood type B, Child 3 has blood type B, and Child 4 has blood type A. o Based on the phenotypes of…arrow_forward
- Analysis of Autosomal Recessive and Dominant Traits In the following pedigree, assume that the father of the proband is homozygous for a rare trait. What pattern of inheritance is consistent with this pedigree? In particular, explain the phenotype of the proband.arrow_forward12:52 0: 9 59.0 a 4l 4 96% KB/S bartleby.com/questions-and-answ = bartleby Science / Biology / Q&A Library / Imagine you h Imagine you have a blood group c Start your trial now! First week only $4.99! → Question Imagine you have a blood group of "X" which is recessive and expressed by xx. The dominant blood groups are Y and Z, where homozygous of these alleles are expressed as YY and ZZ, respectively. What will be the genotype of your parents blood group? Why? Please explain in your own words. [Max 200 words)] View transcribed image text ) Expand Expert Answer Want to see the step-by-step answer?arrow_forwardQUESTION 6 In Drosophila, sepia eyes (se) and stubble bristles (sb) are recessive to the wildtype eyes and bristles (se* and sb+). A female heterozygous for both genes was test crossed to a male homozygous recessive for both genes. The progeny of this cross are given below: Phenotypes wildtype eyes and wildtype bristles (set, sbt) # of Progeny 334 widltype eyes and stubble bristles (set, sb) 162 sepia eyes and wildtype bristles (se, sb+) 158 sepia eyes and stubble bristles (se, sb) 346 What is the genetic distance (in map units) between these two genes? Are the alleles in the heterozygous female in the cis (coupling) or trans (repulsion) conformation? Are the two genes in this problem unlinked, completely linked or incompletely linked?arrow_forward
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